Agenda
- Basic Terms
- OSI and TCP/IP Model
- Protocols
- Advanced Topics
Client
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MAC Address
- 12 Character Number assigned to each Client
- Used to address local Clients over Wire or Wireless
- Can usually be changed manually
IP Address
- Two Version 4 and 6
- 32 or 128 Bit
- Used to address Clients
- Can be changed within the local Network
- Mostly fixed for public IP address
Switch
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Router
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OSI Model
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TCP/IP Model
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OSI vs TCP/IP Model
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Address Resolution Protocol (ARP)
- Maps MAC to IP Address
- Local Cache of Mapping
- Request for missing Items
- Data Link or Network Access Layer
Transmission Control Protocol (TCP)
- Protocol for delivering Messages
- Reliable, Ordered and Error Checked
- Transport Layer
User Data Protocol (UDP)
- Protocol for delivering Messages
- Shoot and Forget, Fast
- Transport Layer
File Transfer Protocol (FTP)
- Used to transfer Files
- Application Layer
- Port 21
Secure Shell (SSH)
- Securely access Computer over insecure Network
- Application Layer
- Port 22
Dynamic Host Configuration Protocol (DHCP)
- Automate Network Configuration of Service
- Network and Data Link or Network and Network Access Layer
- Port 67
Domain Name System (DNS)
- Map IP Address to Hostname
- Application Layer
- Port 53
Hypertext Transfer Protocol (HTTP)
- Used to transfer and interact with Media
- Application Layer
- Port 80
Routing
- How to reach other Network
Rules
- IPs
- Ports
- Protocol
- Dangerous Traffic
VPN
- Secure Connection over insecure Network
- Encryption
- Hide private Information
- Access internal Resources